1、 Leaf difference

The leaves of Nicotiana tabacum are shovel shaped or rectangular round at the lower part of the stem, the base of the leaves slightly embrace the stem or have winged handle, and the leaves close to the inflorescence are lanceolate

The stems and leaves of tobacco flowers are covered with a layer of short sticky villi, and the leaves are light red, light blue or light gray

2、 Flower difference

The inflorescence of Nicotiana tabacum is pseudoracemose, and several flowers are scattered; The pedicel is 5 to 20 mm long, the calyx is cup-shaped or bell shaped, the length is 1.5 to 2.5 cm, the lobes are drill needle shaped, the tube is 5 to 10 cm long, and the tube is 3 to 4 mm in diameter

The flowers of tobacco flowers are trumpet shaped and have white, yellow, red or purple colors